JPH0620517B2 - Filter element for flat membrane separation device - Google Patents

Description

【発明の詳細な説明】 ≪産業上の利用分野≫ この発明は、限外過膜や逆浸透膜などの半透膜の膜
を用いて膜分離処理するための平膜型分離装置用板の
過素子に関する。DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a plate for a flat membrane separation device for performing a membrane separation treatment using a semipermeable membrane such as an ultrapermeation membrane or a reverse osmosis membrane. Regarding the over-element.

≪従来の技術≫ 平膜型分離装置は、食品製造プロセス用あるいは廃水処
理用などに広く使用されており、その分離素子として
板は、合成樹脂からなる板状の基板の表面に凹凸状の集
液部を設け、この集液部に膜を張設して構成されてい
る。<< Prior Art >> Flat membrane separators are widely used for food manufacturing processes, wastewater treatment, and so on. A liquid portion is provided and a film is stretched over the liquid collecting portion.

平膜型分離装置は、この板の複数膜をガスケットを介
在させて積層して組み立てられ、これを用いて膜分離処
理に行なうには、ガスケット厚さにより互いに隣接する
板間に形成される間隙に原液を供給し、膜を通過し
た透過液を集液部に収集して行なわれる。The flat membrane type separator is assembled by laminating a plurality of membranes of this plate with a gasket interposed, and in performing the membrane separation process using this, a gap formed between the adjacent plates depending on the gasket thickness. It is carried out by supplying the undiluted solution to the, and collecting the permeated solution that has passed through the membrane in the collecting section.

平膜型分離装置の処理能力は、膜面積に比例する。従
って板の表面積が大きければ有利に膜分離処理を行な
うことが可能である。The throughput of the flat sheet membrane separator is proportional to the membrane area. Therefore, if the surface area of the plate is large, the membrane separation treatment can be advantageously performed.

そこで本発明者は、先に特開昭６３−２６７０４３号で
枠体と過素子とを別個に射出成形により製作し、これ
らを組合せて膜面積の大きな板を作ることに成功し
た。また、枠体に組込まれる好適な過素子として特開
昭６３−２６７４０４号で提案した。Therefore, the present inventor succeeded in producing a plate having a large film area by previously producing the frame and the over-element separately by injection molding in JP-A-63-267043 and combining them. Further, as a suitable overelement incorporated in a frame, it has been proposed in JP-A-63-267404.

すなわち、この先願の過素子ａは第７図に示されるよ
うに、合成樹脂からなる長方形の板状の基板１の表，裏
面に凹条部２と凸条部３を交互に配置して集液部４を形
成し、この集液部４条を膜５で覆い、上下の端部を合
成樹脂からなるクリップ６ａ，６ａで固定するとともに
左右端をリング状ゴム６ｂ，６ｂで固定して構成されて
いる。That is, as shown in FIG. 7, the over-element a of this prior application is obtained by alternately arranging concave stripes 2 and convex stripes 3 on the front and back surfaces of a rectangular plate-shaped substrate 1 made of synthetic resin. The liquid part 4 is formed, the liquid collecting part 4 is covered with a film 5, the upper and lower ends are fixed by clips 6a, 6a made of synthetic resin, and the left and right ends are fixed by ring-shaped rubbers 6b, 6b. Has been done.

この過素子ａを用いて板を組み立てるには、図示し
ない枠体に過素子ａの外形と同一の複数の窓部を設け
ておき、この窓部に過素子ａを嵌合して構成される。In order to assemble a plate using the excess element a, a frame body (not shown) is provided with a plurality of windows having the same outer shape as the excess element a, and the excess element a is fitted into the windows. .

≪発明が解決しようとする問題点≫ しかしながら、上記先願の過素子は両サイドの膜支
持がリング状ゴムとなっているので、この過素子の組
込まれた板を積層して平膜型分離装置が組立てられた
際、板に加えられる挾持圧が均一でなく板にたわみ
が生じたとき、リング状ゴムが膜を基板面に均等に押
圧することができず、そこに間隙が生ずることがあっ
た。このため、その間隙から透過液中に原液が混入し膜
分離効果が劣化するという問題点があった。<< Problems to be Solved by the Invention >> However, since the over-element of the above-mentioned prior application has a ring-shaped rubber on both sides of the film support, the plates in which the over-elements are incorporated are laminated to form a flat film type separation. When the device is assembled, if the clamping pressure applied to the plate is not uniform and the plate bends, the ring-shaped rubber may not be able to press the film evenly against the substrate surface, resulting in a gap. there were. For this reason, there is a problem that the raw solution is mixed into the permeated liquid through the gap and the membrane separation effect is deteriorated.

≪問題点を解決するための手段≫ 本発明は上記問題点を解決するためになされたものであ
って、基板面に形成された集液部状に膜を張設して構
成された平膜型分離装置用板の過素子において、 前記基板の集液部面の端辺に沿って形成された断面形状
が段状の溝部と、 上記溝部の断面形状とほぼ同一断面形状を有し、かつそ
の段壁が鋭角のテーパを有している板状の合成樹脂から
なる膜押え片とからなり、 前記溝部状に載置された膜の上方から該溝部に前記膜
押え片を圧入して膜を基板に支持したことを特徴とす
るものである。<< Means for Solving Problems >> The present invention has been made to solve the above problems, and is a flat film formed by stretching a film on a liquid collecting portion formed on a substrate surface. In the over-element of the plate for a mold separating device, the cross-sectional shape formed along the edge of the liquid collecting surface of the substrate has a step-like groove, and the cross-sectional shape is substantially the same as the cross-sectional shape of the groove, and The stepped wall is made of a plate-shaped synthetic resin having a taper with an acute angle, and the film pressing piece is press-fitted into the groove from above the film placed in the groove. Is supported on a substrate.

≪作用≫ 本発明は、上述の構成からなり、膜の載置されている
溝部に膜押え片が圧入されて膜が固定される。<< Operation >> The present invention has the above-described configuration, and the film is fixed by pressing the film pressing piece into the groove portion in which the film is placed.

≪実施例の説明≫ 本発明の実施例を図面に基づいて説明する。なお従来と
同一構成要素には同一符号を付して説明する。<< Description of Embodiments >> Embodiments of the present invention will be described with reference to the drawings. It should be noted that the same components as those of the related art will be described with the same reference numerals.

第１図は本発明に係わる平膜型分離装置用板の過素
子ａを枠体ｂに組込んで得られた板ｃの正面図であ
る。FIG. 1 is a front view of a plate c obtained by incorporating an excess element a of a plate for a flat membrane separation device according to the present invention into a frame body b.

過素子ａの組込まれる枠体ｂは、合成樹脂からなって
いて、射出成形により一体成形されてものであって、全
体的には偏平な縦長の長方形状をしているとともに、そ
の内側の上下，左右に４個の縦長の長方形状の窓部７，
７…が開口されている。The frame b in which the overelement a is incorporated is made of a synthetic resin and may be integrally molded by injection molding. The frame b has a vertically long rectangular shape as a whole, and the upper and lower inner sides thereof are , 4 vertically long rectangular windows 7,
7 ... is opened.

各窓部７，７…の周縁は第２，３図に示されるように段
付周縁８で形成され、このうち外側の一辺の段付周縁８
は、底壁面９に対し鋭角のテーパを有した側壁面１０が
形成されている。The peripheral edge of each window portion 7, 7, ... Is formed of a stepped peripheral edge 8 as shown in FIGS.
Is formed with a side wall surface 10 having an acute taper with respect to the bottom wall surface 9.

枠体ｂの上方および下方には、板ｃが積層された際の
原液通路を形成する上部開孔１１，下部開孔１２，透過
液通路を形成する透過液孔１３および濃縮液通路を形成
する濃縮液孔１４が開設され、さらに中央部にも原液の
通路を形成する中央部開孔１５が開設されている。Above and below the frame b, an upper opening 11, a lower opening 12, a permeate hole 13 forming a permeate passage and a concentrated liquid passage are formed when the plates c are stacked. A concentrated liquid hole 14 is formed, and a central portion opening 15 that forms a passage for the undiluted solution is also formed in the central portion.

枠体ｂの裏面周囲にはリング状にガスケット止め用溝１
６が設けられ、この溝１６に対応した裏面には、ガスケ
ット当接溝１７が設けられている。また枠体ｂの上方の
左右に突出して支持片１８が一体的に形成されている。A ring 1 is formed around the back surface of the frame body b in a ring shape to stop the gasket.
6 is provided, and a gasket contact groove 17 is provided on the back surface corresponding to the groove 16. A support piece 18 is integrally formed so as to protrude to the left and right above the frame body b.

過素子ａは、枠体ｂの窓部７，７…と同じ外形形状
で、その厚さは枠体ｂの厚さよりわずかに薄い合成樹脂
の基板１の長手方向に膜５を巻回し、これを固定して
構成されている。The over-element a has the same outer shape as the windows 7, 7, ... Of the frame body b, and its thickness is slightly thinner than the thickness of the frame body b. It is configured by fixing.

すなわち、基板１の表面および裏面中央部には、凹条部
２と凸条部３とが所定間隔を保って交互に配置されて集
液部４が形成されるとともに、この集液部４の両側、す
なわち基板１の左右の端辺長手方向に断面形状が段状の
溝部１９が設けられている。That is, in the central portion of the front surface and the back surface of the substrate 1, the concave streak portions 2 and the convex streak portions 3 are alternately arranged at a predetermined interval to form the liquid collecting portion 4, and the liquid collecting portion 4 is formed. Grooves 19 having a stepwise cross section are provided on both sides, that is, in the longitudinal direction of the left and right edges of the substrate 1.

一方、集液部４の上下側、すなわち基板１の上下端には
集液部４の形成されている基板厚さより薄く形成された
クリップ止め部２０が形成されている。On the other hand, on the upper and lower sides of the liquid collecting unit 4, that is, on the upper and lower ends of the substrate 1, clip stoppers 20 are formed that are thinner than the thickness of the substrate on which the liquid collecting unit 4 is formed.

膜５は基板１の幅とほぼ同一幅を有し、これを基板１
の長手方向の一端部を巻き始めとして一回転させ、この
巻回された膜５の周囲を、クリップ６ａと膜押え片２
２とにより基板１に固定支持される。The membrane 5 has a width approximately the same as the width of the substrate 1, which is
One end of the film in the longitudinal direction is started to be wound and is rotated once. The circumference of the wound film 5 is clipped with the clip 6a and the film pressing piece 2.
It is fixedly supported by the substrate 1 by means of 2.

クリップ６ａは、硬質塩化ビニルからなり、その断面形
状は第３図に示されるようにコ字状を呈し、その長さは
基板１の幅とほぼ同一である。The clip 6a is made of hard vinyl chloride, its cross-sectional shape is U-shaped as shown in FIG. 3, and its length is almost the same as the width of the substrate 1.

クリップ６ａを用いて膜５を固定するには、膜５の
巻回された基板１のクリップ止め部２０にクリップ６ａ
を嵌めた後、図示しない治具を用いてクリップ６ａを加
熱しながら挟んで行なわれる。In order to fix the film 5 using the clip 6a, the clip 6a is attached to the clip stop portion 20 of the substrate 1 on which the film 5 is wound.
After fitting, the clip 6a is sandwiched while being heated by using a jig (not shown).

膜押え片２２は硬質塩化ビニルからなる全体的には偏平
な細長い板状であって、第４図に示されるように溝部１
９の断面形状とほぼ同一の断面形状を有し、かつその段
壁２２ａが鋭角のテーパを呈し、その長さは基板１の長
手方向とほぼ同一に形成されている。The membrane pressing piece 22 is made of hard vinyl chloride and has a flat elongated plate shape as a whole, and as shown in FIG.
The step wall 22a has a taper of an acute angle, and its length is formed to be substantially the same as the longitudinal direction of the substrate 1.

溝部１９と膜押え片２２とでは、段壁２２ａのテーパ分
の体積だけ溝部１９より大きく形成されるが、膜押え片
２２は硬質塩化ビニルからなるため、膜押え片２２を溝
部１９に第４図の矢印方向へ圧入することが可能であ
る。この圧入によりテーパ分の体積だけ弾性変形して溝
部１９と膜押え片２２の相対する壁面同士が密着固定さ
れて膜押え片２２と基板１とが一体化される。また、挿
入後の膜押え片２２の表面は基板１の表面と同一にな
る。The groove portion 19 and the membrane pressing piece 22 are formed to be larger than the groove portion 19 by the volume of the taper of the step wall 22a. However, since the membrane pressing piece 22 is made of hard vinyl chloride, the membrane pressing piece 22 is formed in the groove portion 19 at the fourth position. It is possible to press fit in the direction of the arrow in the figure. By this press-fitting, the volume of the taper is elastically deformed, and the wall surfaces of the groove portion 19 and the membrane pressing piece 22 which face each other are closely fixed to each other, so that the film pressing piece 22 and the substrate 1 are integrated. Further, the surface of the membrane pressing piece 22 after insertion becomes the same as the surface of the substrate 1.

膜押え片２２を用いて膜５を固定するには、膜５の
上方から膜押え片２２を溝部１９に圧入すると、膜５
は溝部１９と膜押え片２２との間に屈曲状に保持され
る。To fix the membrane 5 using the membrane pressing piece 22, when the membrane pressing piece 22 is pressed into the groove portion 19 from above the membrane 5, the membrane 5 is pressed.
Is held in a bent shape between the groove portion 19 and the membrane pressing piece 22.

基板１の外側の一辺の側壁面形状は、すなわち上述の窓
部７，７…のテーパ面に対応する側壁面形状は、そのテ
ーパ面と同一テーパを有して形成されている。The side wall surface shape on one outer side of the substrate 1, that is, the side wall surface shape corresponding to the tapered surface of the windows 7, 7, ... Is formed to have the same taper as the tapered surface.

過素子ａを枠体ｂに組み立てるには、まず基板１に上
述のように膜５を張設し、これを枠体ｂの窓部７，７
に嵌合して行なう。In order to assemble the excess element a into the frame b, first, the film 5 is stretched on the substrate 1 as described above, and this is attached to the window portions 7 and 7 of the frame b.
To fit.

すなわち、第２図に、二点破線に示すように、まず窓部
７，７…のテーパ付の外側の段付周縁８に基板１のテー
パ付側壁面を当接して後、内側の段付周縁８に基板１の
内側を当接する。That is, as shown by the two-dot chain line in FIG. 2, the tapered side wall surface of the substrate 1 is first brought into contact with the tapered outer stepped peripheral edge 8 of the windows 7, 7 ... The inside of the substrate 1 is brought into contact with the peripheral edge 8.

過素子ａが枠体ｂに嵌合された後、基板１の内側の数
箇所（実施例では４箇所）を皿ビス２３とワッシャ２４
により固定する。従って枠体ｂおよび基板１にはワッシ
ャ２４が枠体ｂの表面から突出しないように切欠きが設
けられているとともに、枠体ｂには皿ビス２３の挿入穴
が形成されている。After the excess element a is fitted to the frame body b, the plate screw 23 and the washer 24 are placed at several locations (four locations in the embodiment) inside the substrate 1.
Fixed by. Therefore, the frame body b and the substrate 1 are provided with notches so that the washer 24 does not protrude from the surface of the frame body b, and the frame body b is formed with an insertion hole for the countersunk screw 23.

枠体ｂに組込まれた過素子ａからの透過液を枠体ｂに
開設された透過液孔１５に排出するには、第５，６図に
拡大して示されているように、基板１の一角を切欠き、
この切欠き部分と同じ大きさのゴムバッキン２５を基板
１に接着し、透過液孔１３からゴムバッキン２５にパイ
プ２６を貫通させて行なわれる。To discharge the permeated liquid from the excess element a incorporated in the frame body b to the permeated liquid hole 15 formed in the frame body b, as shown in the enlarged view of FIGS. Cut out a corner,
A rubber backing 25 having the same size as the cutout is adhered to the substrate 1, and a pipe 26 is penetrated from the permeate hole 13 to the rubber backing 25.

従って、枠体ｂおよびゴムバッキン２５には基板１に設
けられた集液部４に通じる貫通孔２７に通じる孔が設け
られている。Therefore, the frame body b and the rubber backing 25 are provided with holes communicating with the through holes 27 communicating with the liquid collecting section 4 provided in the substrate 1.

なお、中央部開孔１５を有し、さらに透過液開孔１３を
設けるとともに上下に濃縮液孔１４を設けた板につい
ては、本発明者が先に特願昭６１−２５５３８９号によ
り提案した板であるので、各開孔の作用についての詳
細な説明については先願に譲るが、この板ｃを用いて
平膜型分離装置を組み立てるには、まず、板ｃの複数
枚（例えば１０枚）をガスケツトを介在させて積層して
１ユニットとし、このユニットを中間板（図示せず）を
介して複数個積層して組み立てる。Regarding the plate having the central hole 15 and the permeated liquid hole 13 and the concentrated liquid holes 14 on the upper and lower sides, the plate previously proposed by the present inventor in Japanese Patent Application No. 61-255389. Therefore, the detailed description of the action of each opening will be given to the prior application, but in order to assemble a flat membrane separation device using this plate c, first, a plurality of plates c (for example, 10) are to be assembled. Are laminated with a gasket interposed to form one unit, and a plurality of these units are laminated with an intermediate plate (not shown) to be assembled.

また、通液は最初のユニットでは上，下部開孔１１，１
２から中央部開孔１５に向かって原液を流し、次のユニ
ットでは中央部開孔１５から上，下部開孔１１，１２に
向かって流れるようにする。しかも濃縮液および透過液
もこの板ｃを積層したときに形成される通路から排出
する。In the first unit, liquid is passed through the upper and lower openings 11,1.
The undiluted solution is caused to flow from 2 to the central opening 15, and in the next unit, it is made to flow from the central opening 15 to the upper and lower openings 11 and 12. Moreover, the concentrated liquid and the permeated liquid are also discharged from the passage formed when the plates c are stacked.

この実施例によれば、膜は基板の上下でクリップ止め
され、両サイドは基板に設けられた溝部に圧入される膜
押え片で固定されるようにしたので、板の組立時の押
圧力により板にたわみが生じても膜押え片が溝部に圧
入されて基板と一体化しているため、膜押え片も同時に
たわみ、基板から膜が剥離することがない。従って基
板から膜が剥離することがないため透過液に原液が混
入する虞れがなく、膜分離効果の優れた平膜型分離装置
用板の過素子とすることができる。According to this embodiment, the film is clipped on the upper and lower sides of the substrate, and both sides are fixed by the film pressing pieces press-fitted into the groove provided on the substrate. Even if the plate is bent, the film pressing piece is pressed into the groove and integrated with the substrate, so that the film pressing piece is also bent at the same time, and the film is not peeled off from the substrate. Therefore, since the membrane is not peeled off from the substrate, there is no fear that the undiluted solution is mixed in the permeated liquid, and it can be used as an excess element of a plate for a flat membrane type separation device having an excellent membrane separation effect.

なお上述の実施例では膜押え片を基板の両サイドに設け
る例を示したが、これを上下にも設けるようにしても良
い。In the above-described embodiment, the film pressing pieces are provided on both sides of the substrate, but they may be provided on the upper and lower sides.

≪効果≫ 本発明は上述のように膜は基板に設けられた溝部に圧
入される膜押え片で固定するようにしたので、板の組
立時の押圧力により板にたわみが生じても膜押え片が
溝部に圧入されて基板と一体化しているため膜押え片も
同時にたわみ、基板から膜が剥離することがない。従
って基板から膜が剥離することがないため透過液に原
液が混入する虞れはなく、膜分離効果の優れた平膜型分
離装置用板の過素子とすることができる。<< Effect >> As described above, according to the present invention, the film is fixed by the film pressing piece press-fitted into the groove provided on the substrate. Therefore, even if the plate is bent due to the pressing force at the time of assembling the plate, the film pressing is performed. Since the piece is pressed into the groove and integrated with the substrate, the film pressing piece is also flexed at the same time, and the film is not peeled off from the substrate. Therefore, since the membrane is not peeled off from the substrate, there is no fear that the undiluted solution is mixed in the permeated liquid, and it can be used as an overelement of a plate for a flat membrane separation device having an excellent membrane separation effect.

【図面の簡単な説明】[Brief description of drawings]

第１図〜第５図は本発明の実施例を示すものであって、
第１図は本発明に係わる過素子を組込んだ板の正面
図、第２図は第１図のII−II線拡大断面図、第３図は第
１図のIII−III線拡大断面図、第４図は第２図のＡ部拡
大断面図、第５図は第１図のＢ部拡大図、第６図は第５
図のVI−VI線拡大断面図および第７図は従来の過素子
の分解斜視図である。 １……基板 ４……集液部 ５……膜 ６ａ……クリップ １９……溝部 ２２……膜押え片 ２２ａ……階段壁 ａ……過素子 ｂ……枠体 ｃ……板1 to 5 show an embodiment of the present invention,
FIG. 1 is a front view of a plate incorporating an overelement according to the present invention, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 4, FIG. 4 is an enlarged sectional view of a portion A of FIG. 2, FIG. 5 is an enlarged view of a portion B of FIG. 1, and FIG.
FIG. 7 is an enlarged sectional view taken along line VI-VI of FIG. 7 and FIG. 7 is an exploded perspective view of a conventional overelement. 1 ... Substrate 4 ... Liquid collecting part 5 ... Membrane 6a ... Clip 19 ... Groove 22 ... Membrane pressing piece 22a ... Staircase wall a ... Excess element b ... Frame c ... Plate

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】基板面に形成された集液部上に膜を張設
して構成された平膜型分離装置用板の過素子におい
て、 前記基板の集液部面の端辺に沿って形成された断面形状
が段状の溝部と、 上記溝部の断面形状とほぼ同一断面形状を有し、かつそ
の段壁が鋭角のテーパを有している板状の合成樹脂から
なる膜押え片とからなり、 前記溝部上に載置された膜の上方から該溝部に前記膜
押え片を圧入して膜を基板に支持したことを特徴とす
る平膜型分離装置用板の過素子。1. An excess element of a plate for a flat membrane type separation device, which is constructed by stretching a film on a liquid collecting portion formed on a surface of a substrate, along an edge of the surface of the liquid collecting portion of the substrate. A groove portion having a stepwise formed cross-section, and a film pressing piece made of a plate-like synthetic resin having a cross-sectional shape almost the same as that of the groove and having a stepped wall with an acute taper. The flat element of the plate for a flat membrane separation apparatus, comprising: a substrate for supporting the membrane by press-fitting the membrane pressing piece into the groove from above the membrane placed on the groove.